[libvirt-users] assign static external IP to container

[scar]

hello i have a server colocated in a datacenter with several external IP
addresses available to use.  the physical server is using one of these
IPs, and i want to assign another, unused IP to the virtual machine.	i
thought i could just do this by editing the container's
/etc/network/interfaces, setting a static IP address for eth0 much like
i did for br0 on the host machine.... but doesn't seem to be working.
ifconfig shows eth0 has the external address but i can't resolve any
hostnames nor telnet to a direct IP address (no route to host).   if i
change back to dhcp and let eth0 get an internal address, i can at least
access the internet but cannot access the virtual machine from the
internet.  what is the trick to giving a VM a routable, external IP
address?  thanks